Most of previous studies on public services were analyses from the perspective of government. The impacts of institutional factors on user satisfactions have often been absent. While recent studies re-exam public services in a view of 'private government', they have stated that user satisfactions are improved when public services match users' needs. Currently there are three paths to offer public services in the government-run industrial parks. Based on three industrial parks in Taiwan, each executing one of above three service paths, this paper concludes some critical factors affecting user satisfactions of public services by survey and the "Ordered Logic Regression Model" testing. We find the more firms' content with the information-opening level and decision-making process within the park, the more user satisfactions rise. Finally, this paper suggests government to consider users' need about the institutional factors as well as governmental resources when offering public services.